Error: an integer is required, not float

[bmatic385]

OS: Ubuntu 22.04.4 LTS x86_64 VMware Workstation virtual machine
Kernel: 6.5.0-26
Reader: CASTLES EZ100PU

bojan@VM:~$ EMV-CAP -m1 50605687
Processing...
Traceback (most recent call last):
File "/usr/local/bin/EMV-CAP", line 399, in
CAPDU = '00A40400' + ("%02X" % (len(current_app['AID']) / 2)) +
TypeError: %X format: an integer is required, not float